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Thai Child, Adoption & Custody Documents — 6 Cases

Child paperwork follows different routes depending on who issued the document, whether the child and parents are in Thailand or abroad, and whether the receiving office is a district registrar, the Juvenile and Family Court or the Department of Children and Youth. This hub splits the work into six cases, each listing the documents to prepare, the order of certification and a pre-filing checklist. Local practice differs between offices, so confirm with the receiving authority before you start.

Registering legitimation of a child (Kor Ror 11)

How a father registers legitimation of a child at the district office, including the consent of the child and the mother required by section 1548 of the Civil and Commercial Code.

A child born to a woman who is not married to the father is by law the legitimate child of the mother (Civil and Commercial Code section 1546). The father becomes the legal father only through one of the routes in section 1547: a later marriage between the parents, registration of legitimation, or a court judgment declaring the child to be his.

Registration at the district office uses form Kor Ror 11. Section 1548 requires the consent of both the child and the mother. If either cannot or does not appear to consent, the registrar cannot proceed and the father must apply to the Juvenile and Family Court for a judgment in place of that consent.

Read the full Registering legitimation of a child (Kor Ror 11) guide →

Court application to declare paternity

Documents and approach for a Juvenile and Family Court application when district-office legitimation is not possible, under sections 1548 and 1555 of the Civil and Commercial Code.

Where the child or the mother cannot or will not consent, section 1548 allows the father to apply to the court, and the child or the child's legal representative may separately sue to have the child declared legitimate on the grounds listed in section 1555.

These cases fall to the Juvenile and Family Court, which weighs evidence such as cohabitation during the period of conception, public acknowledgment of paternity, records of support, photographs, messages, and scientific testing where a party requests it.

Read the full Court application to declare paternity guide →

Domestic adoption registration (Kor Ror 14)

Age conditions, consents, the trial-custody period and registration for adoptions inside Thailand under Civil and Commercial Code sections 1598/19 onward and the Child Adoption Act B.E. 2522.

Section 1598/19 of the Civil and Commercial Code requires an adopter to be at least twenty-five years old and at least fifteen years older than the person to be adopted. Sections 1598/20 and 1598/21 set out the consents required from the minor and from the birth parents.

Adoption of a child is also governed by the Child Adoption Act B.E. 2522, which requires approval by the Child Adoption Board and a period of trial custody set by law and regulation, supervised by the Department of Children and Youth under the Ministry of Social Development and Human Security.

Read the full Domestic adoption registration (Kor Ror 14) guide →

Intercountry adoption by foreign applicants

The document route for foreign applicants or applicants resident abroad, handled through the Child Adoption Centre of the Department of Children and Youth under the 1993 Hague Adoption Convention.

Thailand is a party to the 1993 Hague Convention on Protection of Children and Co-operation in Respect of Intercountry Adoption, so adoption of a Thai child by an applicant residing abroad runs through the central authorities of both countries rather than a private arrangement between families.

On the Thai side the Child Adoption Centre of the Department of Children and Youth receives the file and places it before the Child Adoption Board. In the receiving country an accredited body prepares the home study and confirms the applicants' eligibility.

Read the full Intercountry adoption by foreign applicants guide →

Parental power and court-appointed guardianship

Documents for parental power under section 1566 of the Civil and Commercial Code, divorce agreements on custody, and appointment of a guardian under sections 1585 onward.

Parental power over a minor rests with the parents under section 1566 of the Civil and Commercial Code, which also lists the situations in which it rests with one parent alone — for example the death of the other parent, an adjudication of incompetency, or a court order allocating parental power.

In a consensual divorce, the agreement attached to the divorce registration usually records who exercises parental power, maintenance and contact arrangements. Thai and foreign authorities regularly ask for this document when considering travel, schooling or passport applications for the child.

Read the full Parental power and court-appointed guardianship guide →

Child documents issued abroad

Using a foreign birth certificate, paternity order or adoption order with Thai registrars, courts and government offices.

A child born abroad to a Thai parent usually needs the foreign birth certificate for Thai civil-registration steps such as birth notification, addition to the house registration or a Thai passport application. The certificate follows the origin country's chain and Royal Thai Embassy or Consulate legalisation, then is translated into Thai.

Foreign court orders on paternity, custody or adoption take the same route, but whether they produce a registration or legal effect in Thailand is for the receiving Thai office or court to decide, and some cases need an additional Thai court step. Ask the receiving authority before legalising the whole set.

Read the full Child documents issued abroad guide →

Send scans by LINE @nycli, phone +66-83-249-4999 or email nycli@ilc.ltd and our team will confirm the steps, anything still missing and a realistic timeline for your case.